Fortnite does not have a traditional score board like most online shooters. You can see your connection speed when selecting your matchmaking region in the settings menu. The ms number reported here appears to be the raw ping to the aws data center.
This is not the sort of number given in games and is not very useful beyond selecting the best region lobby to join.
You can access your in game ping through the menus. Browse to HUD and enable the option. You will now get a read out of in game latency, packets and data usage. Because Fortnites netcode is primarily client side the latency does not matter all that much. You do not need to lead your shots more. At higher latency or lower packets (eg early game) you may have hit registration problems, but overall having a solid 150ms in netstat should not be a huge handicap.
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